The USS Canonicus (YT-187) was a harbor tugboat commissioned by the U.S. Navy during World War II. Built in 1943, the Canonicus was primarily used for towing and guiding ships within harbors and assisting in berthing operations. The tugboat was assigned to various naval bases along the East Coast of the United States, including Norfolk, Virginia, and Key West, Florida. After the war, the Canonicus remained in service with the Navy, continuing its duties in different locations such as Guantanamo Bay, Cuba, and the Panama Canal Zone. In the 1960s, the tugboat was reclassified as a medium harbor tug and redesignated as YTM-187. The Canonicus was eventually decommissioned in 1967 and struck from the Naval Vessel Register in 1968. The tugboat was then transferred to the Maritime Administration and sold for commercial use. Overall, the USS Canonicus served as a reliable and versatile vessel in naval operations during and after World War II, contributing to the efficiency of harbor activities and ship movements.

This description has been generated using GPT-3.5-TURBO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.